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	Allow maintainers to view and edit files of private repos when "Allow maintainers to edit" is enabled (#32215)
Fix #31539
This commit is contained in:
		@@ -887,8 +887,6 @@ func viewPullFiles(ctx *context.Context, specifiedStartCommit, specifiedEndCommi
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		}
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		if pull.HeadRepo != nil {
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			ctx.Data["SourcePath"] = pull.HeadRepo.Link() + "/src/commit/" + endCommitID
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			if !pull.HasMerged && ctx.Doer != nil {
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				perm, err := access_model.GetUserRepoPermission(ctx, pull.HeadRepo, ctx.Doer)
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				if err != nil {
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@@ -58,6 +58,9 @@ func RequireRepoWriterOr(unitTypes ...unit.Type) func(ctx *Context) {
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func RequireRepoReader(unitType unit.Type) func(ctx *Context) {
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	return func(ctx *Context) {
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		if !ctx.Repo.CanRead(unitType) {
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			if unitType == unit.TypeCode && canWriteAsMaintainer(ctx) {
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				return
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			}
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			if log.IsTrace() {
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				if ctx.IsSigned {
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					log.Trace("Permission Denied: User %-v cannot read %-v in Repo %-v\n"+
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@@ -374,7 +374,7 @@ func repoAssignment(ctx *Context, repo *repo_model.Repository) {
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		return
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	}
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	if !ctx.Repo.Permission.HasAnyUnitAccessOrEveryoneAccess() {
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	if !ctx.Repo.Permission.HasAnyUnitAccessOrEveryoneAccess() && !canWriteAsMaintainer(ctx) {
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		if ctx.FormString("go-get") == "1" {
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			EarlyResponseForGoGetMeta(ctx)
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			return
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@@ -1058,3 +1058,11 @@ func GitHookService() func(ctx *Context) {
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		}
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	}
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}
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// canWriteAsMaintainer check if the doer can write to a branch as a maintainer
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func canWriteAsMaintainer(ctx *Context) bool {
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	branchName := getRefNameFromPath(ctx.Repo, ctx.PathParam("*"), func(branchName string) bool {
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		return issues_model.CanMaintainerWriteToBranch(ctx, ctx.Repo.Permission, branchName, ctx.Doer)
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	})
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	return len(branchName) > 0
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}
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@@ -14,6 +14,7 @@ import (
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	repo_model "code.gitea.io/gitea/models/repo"
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	"code.gitea.io/gitea/models/unittest"
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	user_model "code.gitea.io/gitea/models/user"
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	"code.gitea.io/gitea/modules/test"
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	repo_service "code.gitea.io/gitea/services/repository"
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	"code.gitea.io/gitea/tests"
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@@ -73,3 +74,80 @@ func TestPullCompare(t *testing.T) {
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		assert.EqualValues(t, editButtonCount, 0, "Expected not to find a button to edit a file in the PR diff view because head repository has been deleted")
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	})
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}
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func TestPullCompare_EnableAllowEditsFromMaintainer(t *testing.T) {
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	onGiteaRun(t, func(t *testing.T, u *url.URL) {
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		// repo3 is private
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		repo3 := unittest.AssertExistsAndLoadBean(t, &repo_model.Repository{ID: 3})
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		assert.True(t, repo3.IsPrivate)
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		// user4 forks repo3
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		user4Session := loginUser(t, "user4")
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		forkedRepoName := "user4-forked-repo3"
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		testRepoFork(t, user4Session, repo3.OwnerName, repo3.Name, "user4", forkedRepoName, "")
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		forkedRepo := unittest.AssertExistsAndLoadBean(t, &repo_model.Repository{OwnerName: "user4", Name: forkedRepoName})
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		assert.True(t, forkedRepo.IsPrivate)
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		// user4 creates a new branch and a PR
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		testEditFileToNewBranch(t, user4Session, "user4", forkedRepoName, "master", "user4/update-readme", "README.md", "Hello, World\n(Edited by user4)\n")
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		resp := testPullCreateDirectly(t, user4Session, repo3.OwnerName, repo3.Name, "master", "user4", forkedRepoName, "user4/update-readme", "PR for user4 forked repo3")
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		prURL := test.RedirectURL(resp)
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		// user2 (admin of repo3) goes to the PR files page
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		user2Session := loginUser(t, "user2")
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		resp = user2Session.MakeRequest(t, NewRequest(t, "GET", fmt.Sprintf("%s/files", prURL)), http.StatusOK)
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		htmlDoc := NewHTMLParser(t, resp.Body)
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		nodes := htmlDoc.doc.Find(".diff-file-box[data-new-filename=\"README.md\"] .diff-file-header-actions .dropdown .menu a")
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		if assert.Equal(t, 1, nodes.Length()) {
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			// there is only "View File" button, no "Edit File" button
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			assert.Equal(t, "View File", nodes.First().Text())
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			viewFileLink, exists := nodes.First().Attr("href")
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			if assert.True(t, exists) {
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				user2Session.MakeRequest(t, NewRequest(t, "GET", viewFileLink), http.StatusOK)
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			}
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		}
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		// user4 goes to the PR page and enable "Allow maintainers to edit"
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		resp = user4Session.MakeRequest(t, NewRequest(t, "GET", prURL), http.StatusOK)
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		htmlDoc = NewHTMLParser(t, resp.Body)
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		dataURL, exists := htmlDoc.doc.Find("#allow-edits-from-maintainers").Attr("data-url")
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		assert.True(t, exists)
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		req := NewRequestWithValues(t, "POST", fmt.Sprintf("%s/set_allow_maintainer_edit", dataURL), map[string]string{
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			"_csrf":                 htmlDoc.GetCSRF(),
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			"allow_maintainer_edit": "true",
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		})
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		user4Session.MakeRequest(t, req, http.StatusOK)
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		// user2 (admin of repo3) goes to the PR files page again
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		resp = user2Session.MakeRequest(t, NewRequest(t, "GET", fmt.Sprintf("%s/files", prURL)), http.StatusOK)
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		htmlDoc = NewHTMLParser(t, resp.Body)
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		nodes = htmlDoc.doc.Find(".diff-file-box[data-new-filename=\"README.md\"] .diff-file-header-actions .dropdown .menu a")
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		if assert.Equal(t, 2, nodes.Length()) {
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			// there are "View File" button and "Edit File" button
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			assert.Equal(t, "View File", nodes.First().Text())
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			viewFileLink, exists := nodes.First().Attr("href")
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			if assert.True(t, exists) {
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				user2Session.MakeRequest(t, NewRequest(t, "GET", viewFileLink), http.StatusOK)
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			}
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			assert.Equal(t, "Edit File", nodes.Last().Text())
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			editFileLink, exists := nodes.Last().Attr("href")
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			if assert.True(t, exists) {
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				// edit the file
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				resp := user2Session.MakeRequest(t, NewRequest(t, "GET", editFileLink), http.StatusOK)
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				htmlDoc := NewHTMLParser(t, resp.Body)
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				lastCommit := htmlDoc.GetInputValueByName("last_commit")
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				assert.NotEmpty(t, lastCommit)
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				req := NewRequestWithValues(t, "POST", editFileLink, map[string]string{
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					"_csrf":          htmlDoc.GetCSRF(),
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					"last_commit":    lastCommit,
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					"tree_path":      "README.md",
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					"content":        "File is edited by the maintainer user2",
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					"commit_summary": "user2 updated the file",
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					"commit_choice":  "direct",
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				})
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				user2Session.MakeRequest(t, req, http.StatusSeeOther)
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			}
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		}
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	})
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}
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